基于对称帧结构的联合频相估计

发布时间：2018-04-24 10:56

本文选题：联合频相估计 + 对称帧结构　；参考：《电子学报》2017年11期

【摘要】：针对短突发通信系统中联合频相估计的剩余频偏对相偏估计的影响,首次引入对称帧结构的概念.首先,基于一种通用(非对称)帧结构,给出了对称帧结构的概念,并推导出基于此结构的数据辅助和非数据辅助两种同步模式下的载波参数估计克拉美罗界.然后,根据该对称帧结构下载波参数估计克拉美罗界的特征,提出了一种基于对称帧结构的联合频相估计.仿真结果表明,以基于最大似然准则的联合频相估计为例,相较于采用非对称帧结构的相偏估计,采用对称帧结构的相偏估计可以获得更低的均方误差和更大的抗频偏能力.
[Abstract]:Aiming at the influence of residual frequency offset of joint frequency phase estimation on phase offset estimation in short burst communication systems, the concept of symmetric frame structure is introduced for the first time. Firstly, based on a general (asymmetric) frame structure, the concept of symmetric frame structure is presented, and the Crameiro bound of carrier parameter estimation in both data-aided and non-data-aided synchronization modes is derived. Then, according to the characteristic of the parameters of the download wave estimated by the symmetric frame structure, a joint phase estimation based on the symmetric frame structure is proposed. The simulation results show that the joint frequency estimation based on the maximum likelihood criterion can obtain lower mean square error and greater anti-frequency offset ability than that with asymmetric frame structure.
【作者单位】：西安电子科技大学综合业务网理论及关键技术国家重点实验室;通信网信息传输与分发技术重点实验室;
【基金】：国家973计划项目(No.2012CB316103) 国家自然科学基金(No.91438101) 通信网信息传输与分发技术重点实验室开放课题(No.KX162600032) 中央高校基本科研业务费专项资金资助(No.JBG160103,XJS15019) 中国博士后科学基金(No.2015M580819)
【分类号】：TN911.23

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